I've been really into gilets lately. I like to wear a sleeveless jacket, specifically a sleeveless blazer, as a part of my outfit. Especially because that outfit also transitions wonderfully to the outdoors, cuz hey, I'm already wearing a (sleeveless) jacket.

And check out that sleeveless trench coat in the last row (or second to last row on your mobile device). It's cool, no? And those denim vests. I'm always down for a denim vest.